Punch press



Oct. 6, 1931. T. F. PHlLlPPi 1,826,152

PUNCH PRESS Filed Feb. 21, 1929 2 Sheets-Sheet 1 OcLB, 1931. 'r. F. "PHKLIPPI 9 13 PUNCH PRESS Filed Feb. 21. 1929 z'sneets-sneez 2 Patented Oct. 6, 1931 PATENT OFFICE THEODORE F. ZPI-IILIIPPI, OF ST. LOUIS, MISSOURI PUNCH PRESS Application filed February 21, 1829 Serial No. 341,606.

This invention relates to new and useful improvements in punch presses and particularly to the bearings for the drive shaft of I same.

The principal objects of the invention are to provide efficient bearings for the drlve shaft and the operative connection between the eccentric member thereof and the reciproeating plunger of the press.

Other objects of the invention are to provide a ball bearing for the drive shaft at points which are subjected to great strains, namely, the eccentric connection between the V plunger and the drive shaft and the bearing of the latter adjacent to said eccentric connection.

Additional objects of the invention are to generally improve upon the construction of punch presses and to render the operation thereof more efficient whereby less power is required to operate the same and the life thereof is prolonged.

WVith these and other objects in view, my

invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a side elevational view of the punch press and the support therefor.

Figure 2 is a front elevational view of same.

Figure 3 is a top plan view.

Figure 4: is an enlarged fragmental side elevational view of the punch press.

Figure 5 is an enlarged fragmental front elevational view of same, partly in cross section.

Figure 6 is a cross section taken on line 6-6 of Figure 4.

Figure 7 is an enlarged fragmental view showing in detail the method of holding the punch.

In punch presses of the type to which the present invention relates, the strain to which the plunger is subjected is transferred thereby through the operating connection of said plunger to the drive shaft. Consequently said connection and the bearing of the drive shaft adjacent to said connection suffer a great deal and soon become worn out and become inefficient.

It is the purpose of the present invention to provide improved bearings for the shaft and for the operating connection whereby the strains to which they are subjected are successfully resisted and the efliciency of the bearing is not impaired.

Referring by numerals to the accompanying drawings, 10 indicates a punch press 0 which, in the present instance, is shown detachably mounted on support 11. This support consists of a pair of separate members 12 disposed longitudinally in spaced relation with each other and with the longitudinal axis of the press.

Each member 12 comprises a horizontal shelf 12 and front and rear legs 12 and 12, respectively. The front legs 12 extend forwardly obliquely a suitable distance beyond the vertical aXis of the plunger. The rear legs 12 are disposed substantially in vertical plane and are provided on the lower ends with bearings 13 in which is disposed a horizontally arranged rod 14 which extends between said rear legs and has mounted on its ends rollers 15 held in position in any suitable manner. Thus said support and the punch press carried thereon can be readily moved about on its rollers by raising the forward legs from the ground, while, when the press is in use, the shock of the punching operation is taken up by the front legs which rest firmly on the ground.

The punch press 10 includes a frame 16, the lower end of which terminates in horizontally disposed flanges 16 which rest on shelf 12 and are secured thereto by suitable fastening means 17. The upper end of frame 16 extends horizontally and forwardly and is provided with a vertically disposed tubular member 18 provided with a bearing 19 in which operates a reciprocating plunger 20. The lower end of the plunger projects beyond the lower end of tubular member 18 and is provided with a bore 21 in which is arranged a bushing 22 for receiving a punch 23.

A set screw 24 is screw-seated in plunger 20 pres in fiuruedo eqa 113110.111; spueqxe pm: 10

' bearing the bore of plunger 20 and bushing and engages punch 23, thereby securin g it in position.

it dish is disposed in the upper end of bore 21 and forms abutment for the upper ends of bushing 22 and punch 23. Both the bushing and the disk are made of steel to better resist wear and can be replaced when worn out.

Punch 23 cooperates with a die 26 arranged in a holder 27. The latter is secured to an extension or table 28 formed integral with frame 16 and disposed below and in spaced relation with tubular member 18.

A lateral extension 29 projects upwardly suitable distance above the upper end of tubular member 13 and toone side thereof and terminates in a horizontally disposed bearing 30 in which ournaled a drive shaft 31. That end of the bearing 30 presented toward tubular member 18 is provided with a flared enlargement 30 which is spaced from shaft 31 and has its open end 30" terminating in close proximity to the axis of plunger 20. A ball bearing 32 is disposed in end 30". The outer race member 32 of the bearing is fixed in said end while the inner race member 32 fixed on the shouldered portion 31 of shaft 3 Preferably the outer faces or ends of said race members are. arranged flush with the outer face of end 30. Thus shaft 31 is journaled near one end in bearing 30and near the o )posite or powertransmitting end of ball bearing 32. One end of shaft projects beyond bearing 30 and has secured thereon an a ctua tin connection 33 which, in the pres-'- ent instance, consists of a suitable handle whereby said shaft may be rocked so as to bring the punch into the die 26.

The opposite end of shaft 31 has formed on its shouldered portion 31 an eccentric member 34 which projects outwardly from said portion and intersects the of plunger 20. This eccentric member has fixed thereon the inner race member 36 of a ball 37, the outer race member-38 of said bearing being fixed within a ring 39. This ring preferably formed integral with the upper end of a connecting link or pitman 40, the lower end of which latter extends into is pivotally connected to the latter by a pin Ll'near the lower end of said plunger. The bore 20. is

of sufficient size to permit the movement of the connecting link 39 during the operation of eccentric member 3%.

Ring 39 is providedon the side adjacent to the ball bearing 32 with acircular flange 42, the face of which is in sliding contact with the corresponding face of enlargement 3d and bearing These faces of bearing and enlargement 30 are preferably arranged flush with each other so that the flange 42 can operate thereover. The diameter of this flange is sufficiently large so that the ball bearing 32 is enclosed by said flange at all times.

Eccentric member 34 is preferably in the form of a longitudinal extension formed integral wi h the shouldered portion 31 and the inner race 36 of bearing 37 is secured thereon. The outer face of ring 39 is closed by a washer 43 which has an outwardly presented circular flange and formed in this flange are diametrically disposed recesses el l. A cotter pin a5 is seated in the projecting end of eccentric 3st and occupies said recesses er thereby holding the washer 43 against rotation. Cotter pin 45, together with washer 43, serves to hold the ring 39 against bearing 32.with the end 30" of enlargement 30. In this manner the parts of the press which bear the strain of the punching operation are provided with ample bearings. These bearings being in the form of ball bearings-reduce fric tion to minima, thereby facilitating the operation ofthe press and reducing the wear and tear on the machine.

I claim:

1. In a punch press the combination with a reciprocating plunger and an actuating shaft therefor, of a mounting for said shaft, said mounting having an integral bearing at one end for journaling the remote end of said shaft, the other end of said mounting being enlarged and flared outwardly, a ball bearing arranged within said enlarged end flush with the outer face thereof, andsupporting the shaft adjacent to said plun er, an eccentric formed integral with said shaft andprojecting outwardly therefrom, a ball bearing mounted on said eccentric, a pitman pivotally connected at the lower end to said plunger, and a ring carried by the upper end of said pitman and mounted on the ball bearing of said eccentric, said ring being juxtaposed to and having sliding contactwith the flushed faces of said enlarged end and the shaft ball bearing arranged therein.

2. In a punch press, the combination with a reciprocating plunger and an actuating shaft therefor, of a mounting for said shaft, said mounting having an integal hearing at one end for journaling the remote end of said shaft, the other end of said mounting being enlarged and flared outwardly, a ball bearing arranged within said enlarged end flush with the outer face thereof and supporting the shaft adjacent to said plunger, .an eccentric formed integral with said shaft and projecting outwardly therefrom, a ball bearing mounted on said eccentric, a pitman-pivotally connected at the lower end to said plunger, a ring carried by the upper end of said pitman and mounted on the ball bearing of said eccentric, said ring being juxtaposed to nd having sliding contact with the flush faces of said enlarged end and the shaft ball bearing arranged therein, and means on the end of said eccentric for engaging said ring and holding it in sliding engagement with the faces of said enlarged end and of said shaft bearing.

3. In a punch press, the combination with a reciprocating plunger and an actuating shaft therefor, of a mounting for said shaft, said mounting including a bearing formed integral with one end thereof and supporting the remote end of said shaft, the opposite end of said mounting being enlarged and flared outwardly, a ball bearing disposed within said enlarged end for supporting the shaft adjacent to said plunger, an eccentric carried by said shaft and projecting longitudinally therefrom, a ball bearing arranged on said eccentric, a pitman pivotally connected at one end to said plunger, and a ring carried by the other end of said pitman and encircling said ball bearing of said eccentric, said ring being provided on one side with an annular flange having a sliding contact with the enlarged end of said mounting and the end of the ball bearing mounted therein for enclosing said shaft ball bearing at all times. 4. In a punch press, the combination with a reciprocating plunger and an actuating shaft therefor, of a mounting for supporting said shaft, said mounting having the end adjacent to said plunger enlarged and flared outwardly, a ball bearing disposed within said enlarged end flush therewith for supporting the shaft adjacent to said plunger, an eccentric projecting longitudinally from said shaft, a pitman pivotally connected at one end to said plunger and having a rin formed on the other end for enclosing sai eccentric, said ring being provided with an annular flange having a sliding contact with the flush surfaces of said ball bearing and said enlarged end of said mounting for en- 7 closing said bearing at all times and a ball hearing interposed between said eccentric and said ring to form operative connection between said shaft and said pitman.

In testimony whereof I hereunto aflix my signature this 19th day of February, 1929. THEODORE F. PHILIPPI. 

